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Where did you get the 25 pint per day load from? What you want for %RH level? In green grass climates and typical fresh air leaks, better to 35-40 pints per day of real moisture removal. This suggest a 65-90 pint dehu. To check efficiency, for a rough guide refer to full load amps at 80^F, 60%RH. For capacity, 66% of the 80F,60%RH rating. I work for Santa Fe. We have refined the design over 18 years. They are very reliable and efficient. Regards TB

These guys are cute. They slam the best rated dehuss made. Both the units you ask about are higher capacity than theirs. I could not find a energy star rating on them. Both units you ask about have simple straight forward air defrost. When the crawlspaces are very cold, dehumidification is not required. These better units go in a non-energy consuming mode. The wait for the temperature to go above 55^F and then resume operation. This extends their service life and save a tremendous amount of energy. We have been making high eff. commercial grade dehus for 18 years. We are not the cheapest but are the best. Regards TB

The SF Compact is a 25% less efficient dehu than the SF Advance. About 25 Less pints per day capacity. Crawlspace dehus also absorb some moisture from the rest of home. I suggest the larger more efficient unit if you can afford and have room. If space or money are an issue, the SF Compact will handle the space. Keep us posted. TB

probably cause in like my area, I was required to have 10 crawl vents and I live in humid environment. 1st year in my new house, my ducts sweat and I had a hard time keeping my humidity down in the house. I sealed off my crawl vents. Problem solved.

But to the OP you want to find where and how moisture is entering your crawl, whether it be air infiltration a grading issue or what prior to just putting a dehum under your house.

It's hard to stop a Trane.but I have made one helluva living keeping them going.